Shank and bit punch



Sept. 23', 1924. 1,509,220

- L C.BAYLES ET AL SHANK AND BIT PUNCH Filed Jan. 17, 1923 5 Sheets-Sheet 1 L. C BAYLES ET AL SHANK AND BIT PUNCH Filed Jan. 17, 1923 5 sheets sheet Sept; 23 1924.

' 1,509,220 L. C. BAYLES ET AL SHANK A-ND BIT PUNCH Filed Jan. 17, 1923 5 Sheets-Sheet 5 wya,

Sept. 23, 1924. 1,509,220

L. C. BAYLES ET AL SHANK AND BIT PUNCH Filed Jan. 17 1923 5 Sheets-Sheet 4 Sept. 23 1924. I 1,509,220

L. C. BAYLES ET AL SHANK AND BIT PUNCH Filed Jan I 17 1923 5 Sheets-Sheet 5 aq gtozl S Lewis 15/ e @5 12 emwfi Patented Sept. 23, 1924.

NITED STATES PATENT OFFICE.

LEW IS C. BAYLES, 0F EASTON, PENNSYLVANIA, AND ARTE UR E. PETERS, OF LITTLE- TON, COLORADO, ASSIGNORS TO INGERSOLL-RAND COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

,SHANK AND BIT PUNCH.

Application filed January 17, 1928. Serial No. 613,125.

To all whom it may concern:

Be it known that we, Laws C. BAYLES, a citizen of the United States, a resident of Easton, Northampton County, and State of Pennsylvania, and ARTHUR E. PETERS, a citizen of the United States, a resident of Littleton, Arapahoe County, and State of Colorado,.have invented a certain Shank and Bit Punch, of which the following is a specification accompanied by drawings.

This invention relates to machines for punching hollow objects, but more particularly to a fluid actuated shank and bit punch of the hammer t pe, for punching the shanks and bits of ollow drill steels, and is in some respects like the machine disclosed in Letters Patent No. 1,463,134 granted July 24, 1923, to Har V. Haight, for shank and bit punch, wit additional features.

The objects of the invention are to enable relatively hard and rapid blows of impact to be imparted to the pin for hammering the pin into the steel, and also produces blows of impact for hammering the in out of the steel, substantially equal in .orce tothose utilized for driving the pin into the steel.

Greater trouble has been experienced in driving the pins into and out of the shanks of the drill steel than into and out of the bits, princi ally because the pin must be driven considerably deeper into the shank in order to clear the hole and greater effort is also required to withdraw the pin. The hammer. piston of our present device isadapted to strike a severe blow upon a forward anvil block holding the pin, and when the pin is to be driven out of the hole in the steel, the machine is so constructed that the hammer piston will strike an equally severe vblow upon a rearward anvil block, which has been brought into the path of impact of the hammer, at the same time that the forward anvil block has been withdrawn from the, path of impact.

In carrying out the invention, fluid actuated feedin means are provided for feeding'the mac ine forward and for retracting the machine. Means are also provided for controlling the distribution of motive fluid to both the punching machine and the feeding mechanism and in the preferred form of construction, a valve controls the supply of controlling motive fluid through the agency of the orts and assages leading from the valve to 0th punc ing and feeding mechanisms, so that the operation of punching and feeding will be preferably controlled by the same valve.

The machine is shown in one of its preferred forms in the accompanying drawings, in which- A Figure 1 is a side view partly in longitudinal sectional elevation of our machine applied to a drill sharpener,

Figure 2 is an end elevation of the drill sharpener showing our machine partly in transverse sectional elevation,

Figure 3 is a top plan view of a drill sharpener with our machine applied thereto.

Figure 4 is an enlarged detail lon itudinal sectional elevation of the punc ing mechanism,

Figure 5 is a view similar to Figure 4 with the parts in a diiferent position,

Figure 6 is an enlarged detail longitudinal sectional elevation taken through the valve of the machine,

Figure is a detailed transverse sectional view of Figure 6 on the line 77, and

Figures 8 to 13 inclusive are diagrammatic transverse sectional views taken through the valve shown in Figure 6, i1- lustrating different positions of the valve. In said views, Figures 8, 10 and 12 are taken on the lines 8-8 of Figure 6 and Figures 9, 11 and 13 are taken on the line 9-9 of Fi ure 6.

eferring to the drawings, the shank and bit punch is shown mounted on a drill sharpener for convenience of illustration. The drill sharpener is illustrated diagrammatically and com rises-the base A and the cylinder B adapte to contain afluid actuated piston for actuating the movable cross head. C. The cross head is provided with the jaw member D, and the cylinder is provided with the stationary jaw member E, in the usual manner. A dolly device F is shown mounted on the arm G but as this dolly device forms no part of the present invention, it will not be further described. The drill sharpener and' dolly device are controlled by the usual throttle valve handle H at the side of the drill sharpener.

Our improved shank and bit punch is mounted onthe bracket J suitably secured in any suitable location to the side of the drill shar ener, as by means of the bolts K.

The punc' ing mechanism is slidably mount-.

- nism is provided in this instance with the valveless differential reciprocating piston R having the head S, the'rearwardly extending shank T and reduced neck U and suitable ports and passages are provided for the distribution of motive fluid in the cylinder for actuatin said piston. The cylinder P is mounted tween the front head V and the back head W, and the front head is preferably rovided with the filler piece X. The heads and W are secured to the cylinder P by the side bolts Y.

'A front anvil block a is inserted in the front head V and a front crow head 12 extends over the anvil block and front head. Similarly at the rear end, a rear anvil block a is inserted in the back head W and a rear cross head d islocated over the rear anvil block and rear head. The front and back cross heads I) and d are spaced apart by means of the spacers e, which may be in the form of sleeves, and through bolts f passing through the spacin sleeves hold the front and rear cross hea s b and d together. B means of this construction the front and ack cross heads I) and d. may be bodily moved back and forth on the'i' front and back cylinder heads V and W through a given distance.

In the present instance a guide or support 9 for the drill steel '71. is suitably carried on the feed bar L and. may be adjusted forwardly and backwardly by means of the bolt 7' and slot 7: on the guide or support.

. The drill steel h is adapted to rest 1n the guide 9 in ition to have the hole or bore of the dril steel opened 10 the pin 0 carried by the front anvil bloc a. For punching bits of drill steels, the guide will be ad uSted in the position shown in igure 1, 'while for punching drill steel shanks, the guide will be adjusted nearer the punching mechanism since the pin must be driven further into the drill steel than in punching a bit. a

front of the piston p, the entire machine will be fed forward, in which case the space substantially '0 in the feed cylinder will be vented, to atmos here. For retracting the machine, the

con itions are reversed and the front end u of the cylinder is vented. to atmosphere while fluid pre$ure is admitted behind the piston 12. 7

The control of motive fluid for the punching and for the air feeding mechanism is preferably effected by means of the throttle valve r mounted in the back head 8 and controlling the inlet w. This throttle valve r is preferably connected to be actuated by means of a hand lever a' pivoted at 1 on the frame of the drill sharpener, provided with an operating handle 2. A valve rod 2 pivoted at the point 3 to the lever m is also pivot'ally connected at the point 4 to an arm 5 connected to the throttle valve r, so that by manipulating the hand lever w, the throttle valve 1* may be rotated back and forth from neutral position, which is the position .indicated in Figure 1 and in Figures 8 and 9. A retracting spring 6 is connected to the hand lever m at any suitable point 7 and also connected at any suitable point 8 to the punching mechanism. By manipulating the handle towards the drill sharpening machine, and against the tension of the spring 6, the controlling valve 1' will be rotated into a position to start the hammer of the punching mechanism and also start the machine feeding forward in order to drive the pin 0 into the drill steel 72.. When the shank or bit of the drill steel has been punched out, the operator removes his hand from the hand lever a: and the retracting spring 6 retracts the lever w and throws the valve 1' to reversed position, in which case the air feed cylinder moves the machine rearwardly and the pin is driven out of the drill steel. When the punching mechanism approaches the rear end of the bar L, its initial position, an extension 9 on the rod 2 which *connects thehand lever 00 with the valve arm 5 strikes against a stop 10 on the back head 8 and returns the valve lever w to neutral position thus cuttin off the sup ly of motive fluid from both e feed cylinder and the hammer cylinder. This construction considerably increases the speed of operation of the machine and also serves to keep the punch from creep-ing forward along the bar L during the time that the drill sharpener is bein operated and when the punching mechanism is not. [in use.

In the operation of the a paratus, let it be assumed that the controllin valve r is in neutral position with the va ve, arm 5 vertical as indicated in Figure 1. This position of the arts is also indicated in Figures 8 and 9 iagrammatioally. Motive fluid admitted ,throughthe inlet w may pass to the hollow bore 12 of the valve 1' through the valve openings '13,

shown in Figure 6. The supply to the indicated in. igures 8 and 9, which are sections taken respectively on the lines 8 and 9 of Figure 6. The parts of the punching mechanism and of the feed cylinder will be in the positions indicated in Figures 1 and 4, with the front anvil block a in osition to receive the blows of impact of e hammer iston R, while the rear anvil block a wi be out of the path of the hammer piston. By moving the hand lever w towards the drill shar ning machine, the valve 1' will be rotated? into a position to i admit motive fluid to the hammer cylinder through the passage 14 and also admit motive fluid through the passage 15 to the forward end of the feed cylinder! Q. The rearward end of the feed "cylinder Q will be vented to atmosphere through the l6 and through a suitable passage in the valve r as indicated in Figure 6.

The machine will be fed forward and the pin 0 will be hammered into the hollow article or drill steel to be punched; When the pin has been driven sufliciently far into either the shank or hit of the drill steel, the hand lever m is released and the retracting spring 6 retracts the lever in the opposite direction, thus reversing the throttle valve 0' and moving it to the position indicated diagrammatically in Figures 12 and 13, in

whichcase motive fluid is continuously sup-- plied through the passage 14 to the hammer cylinder, but the functions of the paa s 15 and 161 leading to-the air feed cylin or are reversed and motive fluid is supplied to the passage 16 leading to the rear end of the feed cylinder, while the forward end is opened to atmosphere through the passa e 15. As the feeding mechamsm moves the machine rearwardly away from the drill steel, the front and rear anvil blocks a and 0 automatically assume the positions indicated in Fi ure' 5, so that the hammer piston imparts lows of impact to the rear anvil block 0 while the forward anvil block a is out of the ath of the iston. As the extension 9 on t e valve rod 2 strikes the stop 10, the valve is automatically returned to neutral q, me 8 and 9 and the operation 'of the mac 'ne is stopped.

We claim: .1. In a fluid actuated machine for punching hollow articles, the combination with a cylinder and reciprocating piston bodily Y movable to and from the-article to be unched, of an anvil block at each end of e cylinder, one anvil block being adapted to carry a pin, means for causing the piston to impart blows of impact to one or the other of the said anvil blocks according to the direction in which the pin is to be driven, fluid actuated means for feeding the machine forwardly and for retracting the machine, manually actuated means for controlling the distribution of motive fluid to both the punching machine and the feeding mechanism, and

means for automatically returning the said controlling means to neutral position when released from manual control.

2. In a fluid actuated machine for punching .hollow articles, the combination with a cylinder and reciprocating piston bodily movable to and from the article to be punched,

of an anvil block at each end of the cylin-- der, one anvil block being adapted to carry a pm, means for causing the piston to impart blows of im act to one or the other of the said anvil bl hcks according to the direction in which the pin is to be'driven, fluid actuated means for feeding the machine forwardly and for retracting the machine, a manually actuated valve controlling the supply of motive fluid, and orts and passages leading from the said va ve to both the punching machine and the feeding mechanism, whereby the operations of punching and feeding arecontrolled by the same valve, and means for automatically returning said valve to neutral position when the valve is released from manual control. 7

3. In a fluid actuated machine for punching hollow articles,-the combination with a *cylinder and reciprocating piston bodily movable to and from the article to be punched, of an anvil block at each end of the cylinder, one anvil-block being adapted to carry a pin, means for causing the piston to impart blows of impact to one or the other of the said anvil blocks according to the direction in which the pin. is to be driven, fluid actuated means for feeding the machine forwardly and for retracting the machine, a valve' controlling the supply of motive fluid, ports and passages leading from the said valve to both the punching machine and the feeding mechanism, whereby the operations of punching and feeding arecontrolled by the same valve, a hand lever for actuating said valve and means for automatically returning said valve and lever to netural gesition after the punching mechanism has n retracted from the work. a 4. In a fluid actuated machine for punchinguhollow articles, the combination with a cy der bodily movable to and from the arhole to be punched and valveless diflerential reciprocating iston. in said cylinder ha a head and a s ank, of an anvil block at each end of the cylinder, one anvil block adapted to carry a pin, means for causing 1; e iston to impart blows of impact to e other of t e said anvil blocks according to the direction in which the pin is to be driven, automatic fluid actuated feed- &

ing mechanism for the machine, and a motive fluid controlling valve for the punching mechanism and feeding mechanism mounted on the bodily movable portion of the machine.

5. In a fluid actuated machine for punching hollow articles, the combination with a drill steel clamp, of a cylinder and reciprocati ng hammer piston, an anvil block at each 1 end of the cylinder, one anvil block being adapted to carrying a pin for opening the bore of a drill steel placed iii-the clamp, means for causing the hammer piston to im part repeated blows of impact to one or the d other of the said anvil blocks according to the repeated blows in rapid succession while feeding is taking place.

6. In a fluid actuated machine for punchin hollow articles, the combination with a drill steel clamp, of a cylinder and reciprocating hammer piston, an anvil block at each end of the cylinder, one anvil block being adapted to carry a pin for opening the bore of a drill steel placed in the clamp, means for causing the hammer piston to impart re-' peated blows of impact to one or the other of the said anvil blocks according to the direction in which the pin is to be driven either into or out of the drill steel, fluid actuated means for feeding the machinee fo'rwardly towards the clamp and for retracting the machine away from the clamp, a common valve controlling the supply of motive fluid,- and ports and passages leading from the said valve to both the hammer cylinder and the feeding mechanism, whereby the operations of unchin and feeding are simultaneous an control ed by the same valve, both in the advancing and withdrawal movements.

7. In a fluid actuated machine for punchin hollow articles, the combination with a dri steel clamp, of a cylinder and reciprocating piston, an anvil block at each end of the cylinder, one anvil block being adapted to carry a pin for opening the bore of a drill steel placed in the clamp, means for causing the hammer pistonto impart repeated blows of impact to one or the other of the said anvil blocks according to the direction in which the in is to be driven either into or out of the rill steel, fluid actuated means for feed ing the machine forwar ly towards the clamp, and for retracting the machine away from the clamp, a common valve controlling the supply of motive fluid, ports and passages leading from the said valve to both the hammer cylinder and the feeding mechanism, whereby' the operations of punching and feeding are controlled by the same valve, a hand lever for actuating said valve and means for automatically returning said valve and lever to neutral positim after the punching mechanism has been retracted from the work.

8. In a fluid actuated machine for punchin hollow articles, the combination with a drill steel clamp, of a cylinder and valveless differential reciprocatin hammer piston having a head and a sha an anvil block at each end of the cylinder, one anvil block being adapted to carry a pin for opening the bore of a drill steel placed in the clamp, means for causing the ammer piston to impart repeated blows of impact to one or the other of the said anvil blocks accordin to the direction in which the in is to be driven either into or out of the drill steel, and automatic fluid actuated feeding mechanism for the machine, whereb the hammer piston will automatically eliver such repeated blows in rapid succession while feedin is taking place either forwardl or backwar 1y.

9. In an apparatus of t 0 character set forth, the combinationwith a drill steel clamp, of a pin punch'for opening the bore of a drill steel placed in the clamp: fluid actuated means for advancing t e punch toward and withdrawin it away from the, I

clamp, a hammer cylin er carried b said means having an-anvil block at eac end, one anvil block carrying the pin punch, a hammer piston in the cylinder for delivering repeated blows of impact to one or the other of the said anvil blocks when the unch is engaged in the bore of the drill stee and means for supplying motive fluid to the hammer to cause it to automatically deliver such repeated blows in rapid succession.

10. In-apparatus of the character set forth, the combination with a drill steel clamp, of a unch pin for operating in the bore ofa drill steel clampe thereby, fluid operated means for automatically delivering rapidly repeated blows to the punch pin,- comprising a cylinder having an anvil block at each end, one anvil blocl: carrying the punch pin, and' a hammer piston in the cylinder and fluid 0 rated means for advancing the punch pm toward the clamp and v withdrawing it away from the same while the hammer is in action.

11. In apparatus of the character set forth, the combination with a drill steel clamp, of a punch pin for operating in the bore of a steel clamped thereby, fluid operated means for automatically deliverin rapidly repeated hammer blows to the punc pm comprising a cylinder havi' an anvil blodk at each end, one anvil blo d carrying the punch pm, and a 'hammorpiston in the 0 linder, fluid operated means for advancing t e punch pin toward the clamp and withdrawing it away from the same while the hammer is in action, means for supplying motive fluid. to both the hammer and the moving means and a common valve for con-' trollin the supply of motive fluid to both.

12. n apparatus of the character set forth, the combination of a drill steel clamp, a punch pin for operating in the bore of a drill steel clamped thereby, fluid operated means for automatically deliveringjrapidly repeated hammer blows to the punch pin, comprising a cylinder havin an anvil block at each; end, one anvil bloc carrying the punch pin, and a hammer piston in the cylinder, fluid actuated means for advancing the punch pin toward the clamp and withdrawing it awayfrom the same while the hammer is in action, means for supplying motive fluid to both the hammer and the moving means, and a common valve for con-' trolling the supply of motive fluid to both,

gaged in the bore of the drill steel, said mechanism comprising a cylinder having an anvil block at each end, and a reciprocating hammer piston in the cylinder, and means for supplying motive fluid to the hammer to cause it to automatically deliver such re.- peated blows in rapid succession.

In testimony whereof we have signed this specification.

LEWIS O. BAYLES. ARTHUR E. PETERS. 

